Researchers (Barker, Dembo, & Lewin, 1941) frustrated some children in a study by making them view attractive toys that were kept out of their reach. When they did allow the children to play with the toys, they found that these frustrated children were more likely to:

not aggress toward the adult experimenters.

Explanation:

Aggression is defined as an unruly behavior  in which the individual with the aggressive tendencies  wants to cause harm intertionally to another person. the harm caused by the individual can be in a verbal form or physical  in nature. In evaluating the learning perspective and environmental determinants of aggression in children.one can only succeed by carefully studying this aggression behavior with other children. Lewin seek to know the root or origins of children aggression and  then  study the biological and learning perspective thereby knowing the root cause of children's aggressive behavior. young children are mostly associated with biological and environmental  context as the influence of their aggression as different studies have shown

answer; i believe that the correct answer to the above question is; (tariff)

the answer is b, encourage free trade